Flour sifter



May 15, 192-3.

1,455,319 w. ADELMANN FLOUR SIFTER Filed NOV. 27, 1922 Patented May 15, 1923i.

UNirsnl STATES yWILLIAM annmvrnlviv,` or'ivnvv vonk, n. Y.'

FLoUR simian.

Application mea November 27, 1922. serial' misgaan."

To all whom t 'may concern." l

Be it known that I, WILLIAM ADELMANN,

al'citiz'en of the United States, residing at Y New York city, borough of the Bronx, in the county of Bronx and StateofNew York, have invented certain new and useful Improvements in Flour Sifters, of which the following is a specification. y i 'This invention relates to flour sifters and has particular reference to mechanical means for the rapid and eicient sifting of flour in bake shops or like places `where a large amount of flour is required'to be so treated.

Among the obj ects of the invention, therefore, is to provide mechanism, preferably power operated and adapted to be actuated substantially automatically, the same conoprising an overhead -mechanisnn lpreferably resiliently suspendedV over the throw (not shown) in which the batch of bread is mixed andkneaded, A said mechanism including a sieve or the like into whichV the flour may be scooped or otherwise `delivered by thebaker and from which it will be sifted directly A25 into the throw. v

Another object of the invention is toprovide a power operated device for causing agitation of the hanger or supporting means for th'e sieve, the agitation lbeing* either in a generally vertical directionor a horizontal oscillatory direction o-r both.

Being aware that in the large city bakeries there isfrequently difliculty in enforcing the requirement that .the flour be thoroughly sifted so as to `remove particles of lint,paper, bits of oord, or other extraneous matter of even a more unsanitary nature, another ob-l ject of this invention is to provide suchv facilities as will render it totally inexcusable for a baker to neglect to sift thoroughly and properly' the flour preparatory to the baking of a large batch. i

Vith the foregoing and other objects in view the invention consists in the arrangement and combination of parts hereinafter described and claimed,'and while the vinvention is not restricted, to the exact details of construction disclosed orA suggested herein, still for the purpose of illustrating a practical embodiment thereof reference vis had to the accompanying drawings, in which like reference characters designate the same parts vinV the several views, and in which'- Figure 1 is a front elevation of a preferred embodiment of the invention, the motor casing-being open, and certain parts being broken away t'oshow construction.`

F ig. 2 is a side elevation of 'the'same o-n a somewhat reduced scalefa'nd indicating the normal relation of the apparatus adjacent to the wall "or support Fig. 3 is adetail of a-modiication to be described below. l f

Fig. 4t is a diagram indicating-an end view of a preferred formof `actuator indicating that the twomain,parts'thereof are arranged at less thanl 180Q apart.

Referring now'more'specifically to the drawings I show at 10a sieve of any suitable size or form but indicated as comprising a frusto'conical'rim having a downward taper and a screen 11 secured to the `lower edge thereof,'as is usual in this sort of devices.

,My apparatus comprises a holder 12 consisting of aA rim like member of a size and form to receive directly'therein and consequently hold the sieve. It will be understood that I am not to be limited in thepres ent description to any particular size or form of such portions of the apparatus.

The normalposition of theholder and sieve is substantially that as shown in'Fig. 2 in which the sieve is held at a slight inclination from the horizontal, oir-tilted downward in `front towardthe operator. y

' The sieve holder 12is suspended by any convenient but preferably resilient means from any suitableadjacent supports, such as the ceiling and side wall, but mainly however beingsupported from the ceiling by a hanger 14:'and a spring 15. A frame comtended upward parallel 4to `each other as shown'at land are connected by ahead piece or cross lb-ar 17 at the top and to the center of it. atlS, the coil spring is'attached.

Below the'headpiece 17 is arrangeda transverse support k19 fora motor M havinga horizontal shaft provided at its opposite ends with pulleys `20 which are of relatively small size and of the same diameter." The support 19 servesalso as a transverse stiffener or bracefor the frame.

prising twooutwardly bow shaped arms 16 lio . sion means at l permits the vertical yrecipor axis portion of an actuator 26. Fixed to the ends "of the shaft 25 are a pair of pulleys 27 in the same vertical planes as the puls leys 2O respectively, and operating over each pair of pulleys so aligned is' asuitable endless belt or 'chain 28.I

As shown in Fig. l one preferred form of the actuator is somewhat in 'the nature of a double cone, the tivo cone portions being connected at' their apexes ata'bout the centra-l .portion of the axis 25 and With the base portion of each cone arranged eccentrically of the shaft 25. It is to be noted `also that the masses or 'larger portions of the several cone bases are arranged on different sides of said axis lor shaft. From the construction just described it will be understood that with the rotation of the actuator at a suitable relatively high speed from the motor there is imparted to the entire device a vibratory effect, and this vibration takes place not only Witlirespect to the vertical, i. e., the direction perpendicular to the diameter of the sieve, but also because of the oppositely disposed eccentrics of the actuator on 'opposite sides of the shaft and adjacent to the opposite ends thereof, the entire mechanism is given an oscillation substantially varound a vertical'central axis of the entire 'apparav tus, imparting to the sieve a rapid movement in arcs of circles of relatively short amplitude, an eifect lcombined With the vertical reciprocatiojns of the apparatus. The shift ingeifect of the vibrations 'and oscillations thus described is materially augmented by the 'fact'of the normal inclination of the sieve bottom. Obviously the spring suspenrocations as just described.

The normal Yinclination of the frame is determined and maintained by means of guy members A28 connected .preferably to vthe curved portions of thel frame 16 spaced vvell above the sieve and'converging to aflink 29 from which another spring 30 leads jto the `point of attachment 3l on the Wall or'other suitable lupright support 32. Thesefmembers 28and 3,0 are preferably resilient "so as not to disturbor prevent the desired oscillation around the vert-ical axis. They serve however to yhold the apparatus substantially in the position shown so as to prevent undue vibration or oscillation of the imachinefto take place. c

` In Fig. 3 I indicatea form of actuator 26. which comprises va silnpleeccentric fixed or y and oscillation. D

supported upon the central portion of the sha-ft 25 .journaled and driven as above described. I have found this 'form of device to be exceedingly satisfactory, with the vibrations produced Vby thiseccentric mainly in -a vertical direction, although in both instances described the linked connection `betvveen the frame 16 and the Wall 32 compels a certain amount of movement of the apparatus in arcs of circles so that in all cases there is a combined movement ofvibr'ation i The motor and other operating parts rare preferably housed Within a casing compris'- ing a main portion 33 and -a door 34 hinged at 35 to one side of theicasing.v A catch 36, of any suitable nature is 4providedfor the opposite side of the door for keeping the casing normal-ly closed. c

Thile this apparatus has been vdevised and constructed primarily for use-in bakeries. for the sifting of Wheat flour or the like, it will of course be understood 'that' the scope of this speciiication and claims is -not in any manner to vbe limited byreference Ito the 'Word flour as material tobe sifted, for obviously the apparatus lis equally 'Well' adapts ed for sifting all kinds of powdered orpulverulent material. a

Iclaim; i 1. ln a flour sifter, the combination'of a sieve and a holder for the sieve', of vmeans to agitate the sieve, such agitating means incli'iding a frame lconnected yto the holder, an eccentric Weight journaled in lthe 'frame on an axis substantially parallel 'to the sieve, and means carried bythe frame for rotating the Weight at relatively high speed. c 2. In va 'flour sifter, ythe combination .With a sieve yand a holder corresponding 'in` form and size thereto for embracing the sieve, 4of means to agitate 'the sieve, said agitating means `including a frame connected 'toth'e holder, an eccentric journaled in the frame on an axisA substantially parallel to theel-iameterof the holder, and ymeans acting 'within the frame for rotating the eccentricy atrelatively high speed. c i

3,. 'Mechanism as set forth. in claim '2 vin `Which'the eccentric is 'so larranged asfto cause vertical reciprocations of Vthe sieve. and' I frame.

4;. 'Mechanism asset forth in claim`2 in lWhich the 'mechanism vis'so arranged as-to gles to the axis-ofthe fram-e.

6. Mechanism asset forth in claim 2 including resilient supporting means forjthe frame.. l f y c I n 7. In alour sifter, thefcombination'lof af both vertically and in `a plane aat-right an- .125

1,455,319k f y l 3 frame including two spaced arms, an aotuasieve, and resilient supporting means fory the 1 tor journaled on a horizontal axis, between frame, said resilient supporting means inf 10 said arms, power means acting to rotate the clucling springs extending rearward` from actuator at relatively high speed, said` aotuthe aforesaid frame-arms to a fixed vertical 5 ator being eccentrically constructed respectsupport. l y ing its axis and to cause agitation of the In testimony WhereofI ailix my signature. frame, a sieve, means Within the lower poraon of the frame to Support and hold the WILLIAMADELMANN. 

